97621556944 has 20 divisors (see below), whose sum is σ = 193754981700. Its totient is φ = 47620271360.

The previous prime is 97621556917. The next prime is 97621556953. The reversal of 97621556944 is 44965512679.

It can be written as a sum of positive squares in 2 ways, for example, as 12345876544 + 85275680400 = 111112^2 + 292020^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74406019 + ... + 74407330.

It is an arithmetic number, because the mean of its divisors is an integer number (9687749085).

Almost surely, 2^97621556944 is an apocalyptic number.

It is an amenable number.

97621556944 is a deficient number, since it is larger than the sum of its proper divisors (96133424756).

97621556944 is a wasteful number, since it uses less digits than its factorization.

97621556944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148813398 (or 148813392 counting only the distinct ones).

The product of its digits is 16329600, while the sum is 58.

The spelling of 97621556944 in words is "ninety-seven billion, six hundred twenty-one million, five hundred fifty-six thousand, nine hundred forty-four".